SANTA CRUZ - Police arrested two Santa Cruz men last week in connection with child pornography videos with victims as young as three years old, Santa Cruz police reported Monday.

The cases were separate and the men did not know each other, police said.

Police seized a computer and other materials from the home of 28-year-old Jonathan Tolentino on the 300 block of Western Drive on Wednesday, Deputy Chief Steve Clark said. A computer seized from the home contained nearly 100 videos with child pornography with victims from ages 5 to 10, police said.

On Friday, Tolentino met with officers at the Santa Cruz police station with an apology letter in which he admitted to watching porn, Clark said. He was arrested, Clark said.

Tolentino was listed in a campus directory at UC Santa Cruz but it is unclear if he is enrolled, UC Santa Cruz spokesman Jim Burns said.

Adam Lessner, 21, turned himself in to authorities on Saturday accompanied by his attorney, police said. Police seized computer equipment from Lessner's home on the 300 block of Everson Drive on July 29, 2010, Clark said.

Lessner had several hundred videos and images of child porn with victims from age 3 to 13 as well as adult bestiality images, Clark said.

Both suspects shared videos and images with an undercover police detective, Clark said. The arrests were part of a proactive effort to stop the proliferation of child pornography, he said.

"These crimes are particularly damaging," Clark said. "It's the proliferation of this kind of material that is a concern for us here."